The AD37 is a small portable device that can read the pin codes from GM/Opel
vehicles typically up to year 2000 models.
The security system fitted to GM/Opel vehicles consists of an immobiliser
which is an integral part of the antenna/coil that is mounted around the igni-
tion barrel.
Free AD37 GM-OPEL PIN CODE READER OPERATING MANUAL
Get the file Download here | PDF-HOME
